#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
    int a,b;
    scanf("%d:%d",&a,&b);
    if(a<12||(a==12&&b==0))printf("Only %02d:%02d.  Too early to Dang.",a,b);
    else { 
        int sum=a-12;
        if(b<0)sum = sum + 1;
        for(int i=1;i<=sum;i++)
        printf("Dang");
    }
    return 0;
}